Printing machine



June'll, 1929. J, KRELL v A l l 1,717,231

PRINTING MACHINE 'Filed sept. '7, 192'? 2 sheets-sheet 1 HELL" INI/6N T047 June 11,V 1929. v l, 'KRELL 1,717,231

` PRINTING MACHINE Filed sept. 7, 1927 2 Sheets-Sheet 2 'Patented .im 11,1929.

JOSEPH XRELL, 'QF B ERLIN-PANKOW, `GIEIIIIJMLANY.

' PRINTING MACHINE.

Application Med September 7, 1927, Serial No. 218,077, and iii Germany September ,21, 1926.

In a referred embodiment of my invention I provide stop fingers arranged in succession along the path through whichthe -sheet is advanced, and with each sto -finger unit I combine afs'et of cains, 'eaci cam being adapted to infiuence the stop lfingers in a different manner, and I provide means for rotating the shaft and for displacing it axially so as to bring any cams out of each set to .bearon the finger units,

In this manner, the single-purpose machine referred tois changed into a universal inachine wliich may pei-forni various kinds of work with a given combination of sets of cams,

and may be changed for any kind of work by replacing a given combination by another. In the accompanying drawings, machines lembodying my invention are illustrated dia- 30 gi'amniatcally by way of example.

Figs. lto 11 illustrate a machine in which blanks may be rinted once or twice, as desired, at the printing station, Y 'o Figs. 12 to 14 illustrate a machine in which three printingr operations are performed on each blank.

Fig. 1 is anelevaton, l Fig. 2 a plan view of the single-printing machine,

Figs. 3 and 4 are sections, on a larger scale, on the lines IIIe-III and IV--IV in Fig. 2,

Figs. 5 and 6 are sections similar to those lin Figs. 3 and 4 butshowing the parts in different positions,

i .Fig. 7 is apart elevation of a cam shaft for the maehine'by which the same blank is printed repeatedly,-

Figs, 8 to 11 are diagrams illustrating the operation of the first-mentioned machine,

4hopper 2, 3 is the lframe of the machine,

Figs. 12 to 13 are similar diagrams for the second-mentioned machine.l l Referring iii-stato Figs. 1 to 11, 1 are the printing plates which are stored in a supply 4, 4 are guiding strips along which tle plates are fed past the printing station, and delivcred to a hopper 5, by automatic means, not shown, 6 is a printing arm, 7 is a printing pad on the arm, 27 is the driving shaft for the arm, the means by which said arm is operated from the shaft forming no part of theI inven tion and being not shown, 8 and 8 are blanks moving toward the printing station where an inking ribbon may be provided so as `to be forced onto the blank by the printing pad, and to produce an impression on the blank through the medium of the printing plate, 10 is a supply of blanks, 9 is a suction elevator adapted to lift blanks from the sup ply 10 and lto deliver them to the frame 3, 11, 11 ai'etwo endless conveyers extending along the frame 3 and moved along the niachine as indicated by the arrows 12 in Fig. 1 in the same direction and at uniform velocity by lneans, not show-n. The conveyors. engage the blanks which the elevator 9 deposits on them and carry thein toward the,

printing station.' r

13 isajgear 'box arranged in front of, and 14, 15 are two gear boxes arranged at the rear of, the printing station at the left of the frame 3, 19, 20, and`21 are transverse shafts each extending from one of the gear boxes, 16, 17, and 18 are blank-retaining fingers arranged on each of the respective shafts, 25 is a cani shaft extending through the three gear boxes` 13,14, and 15, and 26 is chain drive by which A the can shaft 25 is rotated at half 'the speed of the driving shaft 27. i

A pair of' caius, 22, 22', 23, 23', and 24, 24 is arranged on the cam shaft 25 in each of the gear boxes 13, 14, and 15, respectively, and each shaft 19,20, and 21 is provided with an arm 19', 20', and' 21', respectively; each arm beingvadapted A"to cooperate with each pair of cams on the' shaft 25. 'lhe shaft is f splined and provided with a handle 37 at. its front end for pulling it out. In the normali position of the shaft the camsV 22,23, and`24 will cooperate with the arms on the' transverse shafts, as shown for the'l ear boxi 13 1n F1 s.

' 4 and `6, while in its pul ed-out position t e cams 22', 23', and 24'jwill cooperate with the respective arms. 1p

Each shaft is providedy vwith means for holding its arm engaged with the ca'm it is engaging at the time. Suchfmeans may be a spring 36 at the end of 36', as shown for the shaft 19 in Figs. 4and 6. Each shaft is equipped with arms supporting rollers to engage the blanks fronifa ove and to hold them engaged witldthef belts or conveyers 11, 11 unless arres bythe fingers 16, 17, and 18. As will appear ffrom Fig. 2, the shaft 19 hastwo arms 28 on either side of the finger 16 which extend in` forward direction,H each arm supporting' a roller 29, and a single rearwardly extending arm 3.0 with a roller 31. The. shaft 2 0 has only a singleroller 33 on a forwardly extending arm 32, and the shaft 21 has two rollers 35 also extending forwardly on two arms 34.

When the armson the shafts 19, 20, 21 are in cooperation with Ythe cams 22', 23', 24', `which areA depressed on one side only, as shown. in end elevation for the cam 22' in Figs. 3 and 5, eachblank will receive but a single impression at the printing station, but, with the 'eams"22, 23, 24 in operation, which, as shown for the cam 22 lin Figs. 3 and 5, have two depressions, each blank will receive two impresslons.

Referring now to the diagrams Figs. 8 to 11, and assuming that the cams 22, 23, and 24 are in operative position so that each blank will receive two impressions, in Fig. 8 the printing arm 6 is elevated, and, at this moment, the arm 19' of the shaft 19 is engaged withl the concentric portion of the cam 22, as shown in Fig. 3. In this position of the arm 19', the finger 16 is lowered, as shown in dot-and-dash lines in Fig. 4, and projects into the path of the first blank 8" when it has been fed so far by' the conveyers 11, 11. The preceding blank 8' is'intercepted similarly by the nger 17, the arm 20 of the shaft 20 being also engaged with the concentric portion of its cam 23. The blank 8 preceding the blank 8' however, is free to move out of the machine below the finger 18 which vhas been raised by its spring' 36, the arm 21 engaging one of the depressions in the cam 24.

During the downward motion of the printing arm into its printing positionas shown' in Fig. 1, the fingers will remain in the positions of Fig. 8, and the blank 8 is printed, this being the first impression. While the printing arm 6 is returning to its upper position, the finger 16 will still retain the blank 8", as the cam shaft 25 performs onehalf of .a revolution, but the' linger 17 is raised Lid the-linger 18 descends, so that the4 for the second impression in which it is retained by the finger 18, as shown in Fig. 9. While the blank remains in this position, the arm 6 descends for the second time, as shown in Fig. 10, and makes the second impression on the blank 8'. Finally, all three fingers are raised as shown in Fig. 11, allowing the finished blank 8' to leave the machine, the

blank 8" to advance until it will be arrested bythe finger 17 as in Fig. .8, and another blank 8"' to advance as far as permitted by the finger 16 which will resently descend.

The arms supporting t e rollers 29, 33, and 35 are keyed on their respective shafts so that 'they will engage the blanks and hold them down on the belts 11, 11 only when the corresponding fingers are raised, but the arm of the roller 31 is freely supported on its shaft 19 so that it will also when the finger 31 has been raised.

When the parts have returned into the position Fig. 8, the machine is ready to perform the iirst impression on the blank 8".

' By pulling the cam shaft 25 to the left in Fig. 1 by its handle 37 until the levers on the transverse shafts 19, 20, and 21 engage the cams 22', 23', and 24', each blank will receive only a single impression in conformityA with the shape ofthe cams by which the fingers 17 or 1,8, as the case may be, are held o en while the other two fingers are raised a er each half revolution of the corresponding shaft so that the blanks will move on after each impression. A

In the machine illustrated in Figs. 7, 12, i 13, and 14, the cam shaft 25 is provided with a third cam in each gear box, for instance,

the cam 22" in Fig. 7 and this cam is placed in cooperative position \with respect to the machine, the fingers are so controlled as to release the blanks at the finger 16 of shaft 19 only after each third operation of the printing arm 6, and the fingers 17, 18, and 18' are so controlled as shown, that a blank is first arrested by the finger 17, Fig. 12, then by the finger 18, Fig. 13, and finally by the linger 18 Fig. 14. made on the same blank in this manner, and Athe blank is finally released by the finger 18' after the third impression.

I claim: A

1. In a multiform printing press having means for printing a sheet in successive positions, stop fingers for holding'the sheet in ear on the blanks..

Three impressions are each position, and means for advancing the on said shaft for operating said stop fingers, y 4blank 8 is allowed to advance into position and means for alternatively placing said cams in o erative position with respect to shaft adapted to be displaced axially, means said stop ngers. for rotating said shaft, and cams on said 10 2. In a multiform printing press having shaft for operating said stop fingers adapted means for printing a sheet in successive posito be placed alternatively into operative posi- 5 tions, stop lingers for holding the sheet in tion with respect to said fingers by such axial each position, and means for advancing thel displacement. sheet from one position to another, means In testimony whereof I aiixmy slgnature. for operating said stop lingers comprising a -JOSEPH KRELL. 

